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Temporal asymmetry in aerosol optical characteristics:A case study at ahigh-altitude station, Hanle, in Ladakh region

Ningombam, SS and Bagare, SP and Srivastava, AK and Kanawade, VP and Singh, RB and Padhy, SK (2014) Temporal asymmetry in aerosol optical characteristics:A case study at ahigh-altitude station, Hanle, in Ladakh region. Journal of Atmospheric and Solar Terrestrial Physics, 121. pp. 123-131.

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Abstract

Diurnal features of aerosol optical depth (AOD) at a high-altitude station, Hanle (4500 m amsl) in the western Himalayas, were studied using direct/diffuse solar irradiance measurement from a Skyradiometer (Prede) during October 2007 to December 2010. The study reveals a diurnal asymmetry in the measured aerosol characteristics, with three types of diurnal variation in AOD. Among them, Types I and II are prominent during pre-monsoon, while Type III dominates during post-monsoon. Type I appears to be associated with new-particle formation process from gaseous precursors, in addition to the combination of anthropogenic and desert-dust aerosols, probably brought by the prevailing westerly/south-westerly winds during the pre-monsoon season. The diurnal feature of the Type II may be attributed by the transported desert-dust aerosols brought by the prevailing winds. Further, Type III may be associated with the aged background aerosols over the region, pertaining to a small contribution from gaseous precursors.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier
Uncontrolled Keywords: Aerosol optical depth; New-particle formation; Desert-dust; Gaseous precursors; Background aerosols
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 11 Aug 2015 05:16
Last Modified: 11 Aug 2015 05:16
URI: http://moeseprints.incois.gov.in/id/eprint/2768

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